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Subject[PATCH] ASoC: rt5645: Introduce mapping for ACPI-defined GPIO
Date
From: Carlo Caione <carlo@endlessm.com>

On at least one notebook (ECS EF20EA) the 'hp-detect' GPIO is defined in
the DSDT table by the ACPI GpioIo resources in _CRS. Add this mapping to
the rt5645 driver to enable the jack detection also on non-DT platforms.

Method (_CRS, 0, NotSerialized)
{
Name (SBUF, ResourceTemplate ()
{
I2cSerialBusV2 (0x001A, ControllerInitiated, 0x00061A80,
AddressingMode7Bit, "\\_SB.PCI0.I2C2",
0x00, ResourceConsumer, , Exclusive,
)
GpioInt (Edge, ActiveBoth, SharedAndWake, PullNone, 0x0000,
"\\_SB.GPO3", 0x00, ResourceConsumer, ,
)
{ // Pin list
0x004F
}
GpioIo (Shared, PullDefault, 0x0000, 0x0000, IoRestrictionInputOnly,
"\\_SB.GPO3", 0x00, ResourceConsumer, ,
)
{ // Pin list
0x004F
}
})
Return (SBUF) /* \_SB_.PCI0.I2C2.RTK2._CRS.SBUF */
}

Signed-off-by: Carlo Caione <carlo@endlessm.com>
---
sound/soc/codecs/rt5645.c | 11 +++++++++++
1 file changed, 11 insertions(+)

diff --git a/sound/soc/codecs/rt5645.c b/sound/soc/codecs/rt5645.c
index 8f140c8b93ac..7f2d83884556 100644
--- a/sound/soc/codecs/rt5645.c
+++ b/sound/soc/codecs/rt5645.c
@@ -3764,6 +3764,13 @@ static int rt5645_parse_dt(struct rt5645_priv *rt5645, struct device *dev)
return 0;
}

+static const struct acpi_gpio_params hp_detect_gpios = { 1, 0, false };
+
+static const struct acpi_gpio_mapping cht_rt5645_gpios[] = {
+ { "hp-detect-gpios", &hp_detect_gpios, 1 },
+ {},
+};
+
static int rt5645_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
@@ -3779,6 +3786,10 @@ static int rt5645_i2c_probe(struct i2c_client *i2c,
if (rt5645 == NULL)
return -ENOMEM;

+ if (ACPI_HANDLE(&i2c->dev))
+ if (devm_acpi_dev_add_driver_gpios(&i2c->dev, cht_rt5645_gpios))
+ dev_dbg(&i2c->dev, "Failed to add driver gpios\n");
+
rt5645->i2c = i2c;
i2c_set_clientdata(i2c, rt5645);

--
2.14.1
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